Holding-sleeve for conduits.



F. M. BRINUKERHOFP.

HOLDING SLEEVE FOR CONDUITS.

APPLICATION FILED FEB. 17, 1911.

1,037,200, 7 Patented Sept. 3, 1912.

y n Wt I g I INVENTOR ATTORNEY UNITED STATES PATENT OFFICE.

FRANK M. BRINCKERHOFF, OF NEW YORK, N. Y., ASSIG'NOR TO THE ELLCONCOMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

HOLDING-SLEEVE ron oonnurrs.

Specification of Letters Patent.

' Patented Sept. 3,1912.

To all whom it may concern Be it known that I, FRANK M. BRINCKER-l-XOFF, a citizen of the United States, and a resident of the borough ofManhattan, in the city, county, and State of New York, United States ofAmerica, have invented certain new and useful Improvements in Holding-Sleeves for Conduits, of which the following is a specification.

My invention relates to a novel fitting for holding conduits in positionand for suitably connecting them with junction boxes or otherstructures. Its object is to provide a. simple, light and inexpensivefitting by means of which the conduit may be quickly and easilvinstalled and which will effectively hold the conduit in place.

I will describe my invention in the following specification and pointout the novel features thereof in the appended claims.

Referrin to the drawings, Figure 1 is a sectional side elevation of apreferred form of a holding sleeve made according to my invention,together with a portion of the structure to which it is to be affixed.Fig. 2 is a front elevation of the device. In Fig. 3 I have shownportions of two junction boxes with a conduit running between them, eachend of the conduit being connected wit-h one of the junction boxes andheld in place by one of my improved fittings. This figure is a sideelevation, partly in section. Fig. 4 illustrates a similar use of myinvention under somewhat different conditions. modified form of myinvention is shown in sectional side elevation in Fig. 5. In this casethe holding nuts and washer are omitted from the drawing.

Like characters of reference designate corresponding parts in all of thefigures.

10 designates a metallic sleeve, the outer surface of which is threadedas at 11. The inner diameter of this sleeve is somewhat less than theoutside diameter of the conduit with which it is to be used. From oneend the inside of this sleeve is bored out as shown at 12 to a sizeslightly larger than the outside diameter of the conduit, so that thissleeve may be readily slipped over the end of the conduit. The end ofthis bore will form a shoulder or abutment 13. The other end of thissleeve is preferably rounded or chamfered as at 14.

15 and 16 are nuts fitted to the threads on the outside of the sleeve.

17 is a lock washer. This is not an essential part of the device as itmay be used without any washer, or with a plain washer if preferred.

The conduit is designated in the drawings by 20. By conduit I mean acomparatively thin metallic tube such as is in common use for themechanical protection of in sulated electrical conductors.

30 designates portions of junction boxes or other structures with whichthe conduit is to be connected. These structures are pro vided withholes 31 of sufiicient size to allow the sleeves 10 to be passed freelythrough them.

The junction boxes are usually in fixed positions, and the electricalconductors are to be carried to them. The conduit is cut intosuitablelengths to reach these junction boxes. The improved holding sleeves arepassed through the holes 30 in adjacent junction boxes and are slippedover the ends of the conduit which runs between these boxes. The nuts 15and 16 are applied from opposite sides of the wall of the junction box.By means of the outside nuts 15 the sleeves may be moved relatively tothe conduit until the shoulders 13 are up tight against the ends of theconduit. The inside nuts may then be tightened so that all of the partswill thereby be securely held in place. If the lock washers are usedthese of course help to hold the parts together. By the use of thisdevice the conduits used need not be cut to such exact lengths as isnecessary with other devices, as the shoulder 13 is an adjustableabutment movable relative to the junction box and the conduit, and maybe quickly brought into the desired position by means ofthe nuts 15 and16. The manner in which the sleeves on opposite ends of a conduit coactwith the conduit and with each other to hold the conduit in placebetween two junction boxes is clearly shown in Fig. 3.

In Fig. 4 the conduit 20 'is shown with a transverse bend in it and withone of its parts-backed up against a wall 32. The holding sleeve 10 isapplied, as before, and it is obvious that the adjustable position ofthe shoulder 13 may be utilized under such. con ditions to force theconduit back against the wall so as to hold it in desired position. Thesleeve 10 shown in Fig. 5, is for the same purpose and is to be used ina similar mantated and may be done much more quickly,

and consequently at lower cost, than such devices as have heretoforebeen available.

What I claim is.

1., A holding sleeve for conduits comprising a smooth portion adaptedto-surround the conduit, a holding abutment for the end of the conduitat one end of said portion, and means for moving the position of saidsleeve relatively to a stationary object and for affixing said sleeve tothe stationary object.

2. A hollow cylindrical holding sleeve for conduits having its outersurface threaded said sleeve constructed to form a smooth inner portionadapted to surround the conduit and a holding abutment for the end ofthe conduit at one end of said portion; a pair of nuts upon the outerthreaded portion arranged to adjust the longitudinal position of thesleeve and the abutmenttherein relative to a stationary object and toaflix the sleeve to the stationary object.

3. A hollow cylindrical holding sleeve for conduits having its outersurface threaded, said sleeve constructed to form a smooth annular innerportion adapted to loosely surround the conduit and an annular holdingabutment for the end of the conduit at one end of said portion; a pairof nuts upon said outer threaded portion arranged to adjust thelongitudinal position of the sleeve and the abutment therein relative tothe wall of a junction box or the like, and a lock Washer bet-ween saidwan and one of said nuts.

4-. The combination with a conduit, of a pair ofsmooth bored holdingsleeves, one

on either end of the conduit, each of said sleeves having its outersurface threaded and constructed to form a portion adapted to looselysurround the conduit and an abutment for the end of the conduit at oneend of said portion, and means for moving said sleeves longitudinallvrelatively to stationary objects to adjust the positions of saidabut-ments.

5. The combination with a conduit, of a pair of hollow smooth boredcylindrical holding sleeves, one on either end of the conduit, each ofsaid sleeves having its outer surface threaded and comprising a portionadaptedto loosely surround the conduit and an annular abutment for theend of the conduit at one end of said portion, a pair of junction boxes,a pair of nuts on each sleeve arranged to move said sleeveslongitudinally relatively to the junction boxes to adjust the positionsof said abutments, said nuts being also arranged to affix the sleeves tosaid boxes.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

FRANK M. BRINCKERHOFF.

Witnesses:

CHAS. R. ELLICOIT, ERNEST W. MARSHALL.

